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hardware.h
#ifndef OPENMM_HARDWARE_H_
#define OPENMM_HARDWARE_H_
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2013 Stanford University and the Authors. *
* Authors: Peter Eastman *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#ifdef __APPLE__
#include <sys/sysctl.h>
#include <dlfcn.h>
#else
#ifdef WIN32
#define NOMINMAX
#include <windows.h>
#include <intrin.h>
#else
#ifdef __ANDROID__
#include <cpu-features.h>
#else
#include <unistd.h>
#endif
#endif
#endif
static int getNumProcessors() {
#ifdef __APPLE__
int ncpu;
size_t len = 4;
if (sysctlbyname("hw.logicalcpu", &ncpu, &len, NULL, 0) == 0)
return ncpu;
else
return 1;
#else
#ifdef WIN32
SYSTEM_INFO siSysInfo;
int ncpu;
GetSystemInfo(&siSysInfo);
ncpu = siSysInfo.dwNumberOfProcessors;
if (ncpu < 1)
ncpu = 1;
return ncpu;
#else
#ifdef __ANDROID__
return android_getCpuCount();
#else
long nProcessorsOnline = sysconf(_SC_NPROCESSORS_ONLN);
if (nProcessorsOnline == -1)
return 1;
else
return (int) nProcessorsOnline;
#endif
#endif
#endif
}
#ifdef WIN32
#define cpuid __cpuid
#else
#if !defined(__ANDROID__) && !defined(__PNACL__)
static void cpuid(int cpuInfo[4], int infoType){
#ifdef __LP64__
__asm__ __volatile__ (
"cpuid":
"=a" (cpuInfo[0]),
"=b" (cpuInfo[1]),
"=c" (cpuInfo[2]),
"=d" (cpuInfo[3]) :
"a" (infoType)
);
#else
__asm__ __volatile__ (
"pushl %%ebx\n"
"cpuid\n"
"movl %%ebx, %1\n"
"popl %%ebx\n" :
"=a" (cpuInfo[0]),
"=r" (cpuInfo[1]),
"=c" (cpuInfo[2]),
"=d" (cpuInfo[3]) :
"a" (infoType)
);
#endif
}
#endif
#endif
#endif // OPENMM_HARDWARE_H_